Nut-lock.



'struction of nut-lock whic UNITED STATES PATENT oFFroE.\

JOHN SCHMITT, OF BROOKLYN, NEW YORK. Y

NUT-LOCK.

Specification of Letters Patent.

To a/ZZ whom it may concern:

Be it known that I, JoHN SCHMITT, a subject of the German Emperor, residing at Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Nut-Locks, of which the following is a specification.

This inventlon relates generally to nutlocks, and more particularly to that class thereof known as top and thread nutlocks.

The object of the invention is to provide an exceedingly simple and hi hly efficient conl can be quickly and easily applied and when once in use will not work loose.

Another object of the invention is to provide a nut-lookin which neither the bolt ,the working nut, nor the locking-nut is weakened anda still further object is to rovide a nut-lock which utilizes vthe frictiona force of the wedge for eeeting the lock between the nut and bolt and also between the working nut and the lock-nut.

With these objects in view the invention consists in the novel features of construction hereinafter fully described, and pointed out in the claim.

In the drawings forming a art of this specification, Figure 1 is a side e evation of a nut-lock constructed in accordance with my invention. Fig.-2 is a vertical section of the same. Fig. 3 is a top plan view of the working nut. Figs. 4 and 5 are enlarged detail sections showing different styles of thread.

Referring to the drawings, `A indicates the threaded bolt or rod, upon which the working nut B is-screwed, said nut having an annular b oss C upon the top side thereof, said annular boss being split radially, as shown at D. The outer face of the annular boss is inclined or beveled, as shown at E, and at the bottom an annular groove or chamfer F is cut for the purpose' of rendering the annular.

boss elastic. The inner face of the boss is provided with threads of a size similar to the thread of the nut, and'these threads are, in fact, a continuation of the ,threads ofthe nut, but are rovided with square points forming biting ed) es The annular boss, however, is slightly ared or spread, so that it is of a slightly greater diameter than the bore of the Patented Feb. 13, 1906.

nut, as most clearly shown in Fig. 4. The

threads of the annular boss, however, are intended to be wedged into the threads of the bolt, and in orderto accomplish this I employ a lock-nut H, which is screwed upon the bolt and which has a conical-shaped recess I in the lower face thereof, the inclined walls being adapted to contact with'the inclined or beveled exterior of the annular boss C, Yand as the lock-nut H is firmly screwed down the threads G of the annular boss are wedged into the threads of the bolt. The lower edges of the inclined walls of the locking-nut are cut away, as shown at K, in order to avoid friction at that point and relieve the strain from the outer ed e of the lock-nut. It will also be noted that t e lower portion of the lock-nut is round in shape, whereas the upper portion .is hexagonal' in shape, the lower portion being round in order to strengthen the nut at the oint where 'the strain is greater. The loc 'ngnut being firmly screwed down upon the workin nut withits threaded boss the threads o said boss will not only be wedged into the threads of the bolt, but the locking-nut will besesurely wedged upon the said b oss, thereby providing an absolutely tight nut-lock. .It will thus be seen that I provide a nut-lock 1n which neither the bolt nor the nuts are weakened and one in which the owerful force of the wedge is utilized for loc ng the parts together.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A nut-lock, comprisinor a working nut, provided with an annular boss, u on one face, said boss being provided with t eads having square biting ed es, said boss Abeing radially slotted and beve ed and ared outwardly, in combination with a lock-nut havinT a conical-shaped recess in its lower face, the lower edges of the inclined walls of which are cut away, said recess adapted to enga e the beveled face of the annular boss, for t e purpose of wedging the bitin edges of the boss, lnto the threads of the bo t.

' JOHN SCHMITT.

Witnesses:

AUGUST DANNEMANN, CHARLES A. OER. 

